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Redingtonite Mineral Data
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General Redingtonite Information
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 Chemical Formula: |
(Fe++,Mg,Ni)(Cr,Al)2(SO4)4•22(H2O) |
| Composition: |
Molecular Weight = 918.74 gm |
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Magnesium 0.79 % Mg 1.32 % MgO |
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Aluminum 1.47 % Al 2.77 % Al2O3 |
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Chromium 8.49 % Cr 12.41 % Cr2O3 |
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Iron 3.65 % Fe 4.69 % FeO |
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Nickel 0.64 % Ni 0.81 % NiO |
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Hydrogen 4.83 % H 43.14 % H2O |
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Sulfur 13.96 % S 34.86 % SO3 |
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Oxygen 66.17 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Fe2+0.6Mg0.3Ni0.1Cr1.5Al0.5(SO4)4•22(H2O) |
| IMA Status: |
Valid Species (Pre-IMA) 1888 |
| Locality: |
Redington mine, Knoxville, Napa Co., California. Link to MinDat.org Location Data. |
| Name Origin: |
Named after it's locality. |
| Name Pronunciation: |
Redingtonite + Pronunciation  |
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Redingtonite Image |
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Images:
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Redingtonite Crystallography
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| Crystal System: |
Monoclinic |
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Physical Properties of Redingtonite
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| Color: |
White, Light violet, Light purple. |
| Density: |
1.761 |
| Diaphaneity: |
Transparent |
| Habit: |
Fibrous - Crystals made up of fibers. |
| Hardness: |
2 - Gypsum |
| Luminescence: |
Non-fluorescent. |
| Luster: |
Silky |
| Magnetism: |
Nonmagnetic |
| Streak: |
white |
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Optical Properties of Redingtonite
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| Optical Data: |
NCalc= 1.46 - from Gladstone-Dale relationship (KC = 0.263) where Ncalc=Dmeas*KC+1 |
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Calculated Properties of Redingtonite
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| Electron Density: |
Bulk Density (Electron Density)=1.83 gm/cc
note: Specific Gravity of Redingtonite =1.76 gm/cc.
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| Fermion Index: |
Fermion Index = 0.01
Boson Index = 0.99 |
| Photoelectric: |
PERedingtonite = 4.07 barns/electron
U=PERedingtonite x rElectron Density= 7.44 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Redingtonite is Not Radioactive |
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Redingtonite Classification
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| Dana Class: |
29.07.03.06 (29)Hydrated Acid and Sulfates |
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(29.07)where A (B)2 (XO4)4 � x(H2O) |
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(29.07.03)Halotrichite Group (Monoclinic with 22 H2O) |
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29.07.03.01 Pickeringite MgAl2(SO4)4•22(H2O) P 2 2 |
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29.07.03.02 Halotrichite FeAl2(SO4)4•22(H2O) P 2 2 |
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29.07.03.03 Apjohnite MnAl2(SO4)4•22(H2O) P 21/c 2/m |
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29.07.03.04 Dietrichite (Zn,Fe,Mn)Al2(SO4)4•22(H2O) P 21/c 2/m |
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29.07.03.05 Bilinite FeFe2(SO4)4•22(H2O) P 21/c 2/m |
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29.07.03.06 Redingtonite (Fe,Mg,Ni)(Cr,Al)2(SO4)4•22(H2O) Mono |
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29.07.03.07 Wupatkiite (Co,Mg,Ni)Al2(SO4)4•22(H2O) P 21/c 2/m |
| Strunz Class: |
07.CB.85 07 - SULFATES (SELENATES, TELLURATES) |
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07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O |
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07.CB -With only medium-sized cations |
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07.CB.85 Bilinite FeFe2(SO4)4•22(H2O) P 21/c 2/m |
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07.CB.85 Apjohnite MnAl2(SO4)4•22(H2O) P 21/c 2/m |
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07.CB.85 Dietrichite (Zn,Fe,Mn)Al2(SO4)4•22(H2O) P 21/c 2/m |
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07.CB.85 Halotrichite FeAl2(SO4)4•22(H2O) P 2 2 |
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07.CB.85 Pickeringite MgAl2(SO4)4•22(H2O) P 2 2 |
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07.CB.85 Redingtonite (Fe,Mg,Ni)(Cr,Al)2(SO4)4•22(H2O) Mono |
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07.CB.85 Wupatkiite (Co,Mg,Ni)Al2(SO4)4•22(H2O) P 21/c 2/m |
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Other Redingtonite Information
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| References: |
NAME( MinRec) PHYS. PROP.(Dana) |
| See Also: |
Links to other databases for Redingtonite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
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Print or Cut-and-Paste your Redingtonite Specimen Label here :
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Redingtonite
(Fe++,Mg,Ni)(Cr,Al)2(SO4)4•22(H2O)
Dana No: 29.07.03.06 Strunz No: 07.CB.85
Locality:
Notes:
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